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Sonos Playbase S11 dead. No led at the front

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    Sonos Playbase S11 dead. No led at the front

    Good days guys,
    First of all I want to thanks all members of badcaps. This site and its members have help me troubleshoot and repair tv.
    My issue is a Sonos Playbase S11 that completely died on me. Fuse check out ok. No indication of burn on the power supply board. The two big caps are showing 135vdc. I can't seem to find a schematic anywhere.
    I need your help once again.
    Thanks in advance.
    Images are attached
    Attached Files

    #2
    Re: Sonos Playbase S11 dead. No led at the front

    Any help guys.

    Comment


      #3
      Re: Sonos Playbase S11 dead. No led at the front

      Canadian AC Voltage is 120VAC, correct? If it is then the Main filter caps should have about 165VDC measured between the + and - legs of the main filter cap.
      What is the P/N of that SMPS IC, U15?, that drives the power MSOFET on the heatsink?
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

      Comment


        #4
        Re: Sonos Playbase S11 dead. No led at the front

        Hi budm thanks for replying. That's correct canadian AC voltage is 120VAC. U15 P/N is NCP 1937B1G.
        Thanks again for your help.

        Comment


          #5
          Re: Sonos Playbase S11 dead. No led at the front

          So recheck the DCV of the main filter cap again, the cap will be charged up to the peak Voltage of the 120V RMS, 120V x 1.414 = about 169VDC. So may be your meter is not calibrated or error in measurement.
          Never stop learning
          Basic LCD TV and Monitor troubleshooting guides.
          http://www.badcaps.net/forum/showthr...956#post305956

          Voltage Regulator (LDO) testing:
          http://www.badcaps.net/forum/showthr...999#post300999

          Inverter testing using old CFL:
          http://www.badcaps.net/forum/showthr...er+testing+cfl

          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
          http://s807.photobucket.com/user/budm/library/

          TV Factory reset codes listing:
          http://www.badcaps.net/forum/showthread.php?t=24809

          Comment


            #6
            Re: Sonos Playbase S11 dead. No led at the front

            I double check with another multimeter and am reading 160.3vdc on the main caps.

            Comment


              #7
              Re: Sonos Playbase S11 dead. No led at the front

              Originally posted by waakye View Post
              I double check with another multimeter and am reading 160.3vdc on the main caps.
              That is o.k. probably your mains are 110-115V.

              Comment


                #8
                Re: Sonos Playbase S11 dead. No led at the front

                Is odd because the power led on the Playbase is not on. There is no switch to turn it on. You just connect the Playbase to 120vac outlet and the the front led turns on.

                Comment


                  #9
                  Re: Sonos Playbase S11 dead. No led at the front

                  Are there any schematic of this power supply board around. Could someone help to troubleshoot the circuit.
                  Thanks

                  Comment


                    #10
                    Re: Sonos Playbase S11 dead. No led at the front

                    A more zoom in pictures below.
                    Thanks again
                    Attached Files
                    Last edited by waakye; 04-25-2021, 12:23 PM.

                    Comment


                      #11
                      Re: Sonos Playbase S11 dead. No led at the front

                      I guess am on my own on this one.

                      Comment


                        #12
                        Re: Sonos Playbase S11 dead. No led at the front

                        Any help guys!

                        Comment


                          #13
                          Re: Sonos Playbase S11 dead. No led at the front

                          I have the same one. Problem
                          Does anyone know how to solve it? Maybe it's the software?
                          Attached Files

                          Comment


                            #14
                            Re: Sonos Playbase S11 dead. No led at the front

                            Originally posted by waakye View Post
                            Any help guys!
                            If you measure the DCV between the two legs of any one of the 3 lytics green caps that are glued together, do you get any Voltage when the AC is applied to the board? Be real careful not to touch anything in the hot, so to be safe you may want to plug the AC cord into GFCI outlet.
                            Never stop learning
                            Basic LCD TV and Monitor troubleshooting guides.
                            http://www.badcaps.net/forum/showthr...956#post305956

                            Voltage Regulator (LDO) testing:
                            http://www.badcaps.net/forum/showthr...999#post300999

                            Inverter testing using old CFL:
                            http://www.badcaps.net/forum/showthr...er+testing+cfl

                            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                            http://s807.photobucket.com/user/budm/library/

                            TV Factory reset codes listing:
                            http://www.badcaps.net/forum/showthread.php?t=24809

                            Comment


                              #15
                              Re: Sonos Playbase S11 dead. No led at the front

                              Thanks budm for replying. Below are my observations:

                              I have AC applied to the power supply circuit and the each one of the 3 lyrics caps are measuring 13.25VDC and it jumps to 14.53VDC and it keeps cycling continuous from 13.25VDC to 14.53VDC.

                              Thanks again

                              Comment


                                #16
                                Re: Sonos Playbase S11 dead. No led at the front

                                1) So the power supply is not dead then, that power supply is an always on power supply, it will run 24/7 as long as it is plugged into the AC outlet.

                                2) What is the DC Voltage rating as printed on the bodies of those 3 caps?

                                3) There are four lytics caps on the cold side, so check and see if they have any DCV on the two legs of each cap, also tell us the Value and Voltage rating of those 4 caps.
                                Never stop learning
                                Basic LCD TV and Monitor troubleshooting guides.
                                http://www.badcaps.net/forum/showthr...956#post305956

                                Voltage Regulator (LDO) testing:
                                http://www.badcaps.net/forum/showthr...999#post300999

                                Inverter testing using old CFL:
                                http://www.badcaps.net/forum/showthr...er+testing+cfl

                                Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                                http://s807.photobucket.com/user/budm/library/

                                TV Factory reset codes listing:
                                http://www.badcaps.net/forum/showthread.php?t=24809

                                Comment


                                  #17
                                  Re: Sonos Playbase S11 dead. No led at the front

                                  Hi budm. Thanks for the quick reply.

                                  1) If the power supply is not dead then that means the logic board is toast?

                                  2) the voltage rating on the 3 caps are 35V

                                  3) I verified the voltage on the four lytics caps on the cold side and all four reads 13.25VDC then goes to 14.53VDC and keeps cycling between the above values. The DC voltage rating on the caps are 50V.
                                  Last edited by waakye; 04-29-2021, 09:04 PM. Reason: Typo lytics instead of lyrics

                                  Comment


                                    #18
                                    Re: Sonos Playbase S11 dead. No led at the front

                                    The board you have is the power supply/Amplfier board.
                                    Can we see the main logic board next?
                                    Never stop learning
                                    Basic LCD TV and Monitor troubleshooting guides.
                                    http://www.badcaps.net/forum/showthr...956#post305956

                                    Voltage Regulator (LDO) testing:
                                    http://www.badcaps.net/forum/showthr...999#post300999

                                    Inverter testing using old CFL:
                                    http://www.badcaps.net/forum/showthr...er+testing+cfl

                                    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                                    http://s807.photobucket.com/user/budm/library/

                                    TV Factory reset codes listing:
                                    http://www.badcaps.net/forum/showthread.php?t=24809

                                    Comment


                                      #19
                                      Re: Sonos Playbase S11 dead. No led at the front

                                      Hello budm,
                                      Below are the pictures of the logic board as requested.
                                      Thanks for your help in this.
                                      Attached Files

                                      Comment


                                        #20
                                        Re: Sonos Playbase S11 dead. No led at the front

                                        I'm sorry I got into your topic. I didn't have any output voltage from the power supply
                                        There was a short circuit (0Omh) on the three Green capacitors
                                        As a diode, there is a mosfet Q4. It's been burned down.
                                        As I replace it I will say or do it


                                        PS/
                                        Author of the topic check the main voltages on the board (RAM,FLASH,CPU)
                                        Attached Files

                                        Comment

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